Question

evaluate: 2 tan^2 45°+cos^2 30°-sin^2 30°​

Answer 1

Answer:

tan 45°=1

cos 30°=√3/2

sin 30°=1/2

=(2×1)+ (3/4)- (1/4)

=2+3/4-1/4

=2+1/2

=5/2

Answer 2

tan 45 =1

cos 30=

$sqrt{3} \div 2$

sin30 =1/2

2×(1)^2+ root3/2_1/2

=4+1.732_1

=4.732